【摘要】 用土培和水培方法,研究了钾对水稻产量形成的一些生理效应,结果表明,适当供钾可以显著提高谷粒产量和谷草比、叶绿体的光合磷酸化和电子传递活力以及灌浆期植株的净光合率;促进~14C—同化物向谷粒运输和分配,钾对杂交稻同化物运输的效应大于常规稻。更多还原

【Abstract】 Some physiological effects of potassium on yield formation of four rice varieties was investigated on a silty paddy soil with water culture.The results showed that the grain yield and grain-straw ratio significantly decreased especially hybrid rice with low potassium treatment,because photophosphorylation and electron transport activities,net photosynthetic rate and 14C-assimilation translocation and distribution into grain at the filling stage were depressed in the condition of low potassium.The effectsof potassium on assimilate translocation in hybrid rice was larger than general rice,更多还原